南阳市环境污染对植物生理特征的影响

选择南阳市区5个不同污染区的常见绿化树种作为研究对象,研究不同污染区的环境污染对植物生理特征产生的影响。分别测定不同树种成熟叶片的电导率变化、游离脯氨酸含量和叶绿素a/b值生理生化指标,并比较同一功能区不同树种的抗污染能力。结果表明:同一树种在不同功能区的生理生化指标不同,且存在显著差异;同一功能区不同绿化树种的生理生化指标也存在显著差异。各绿化树种的抗污染能力大小为:珊瑚树>大叶黄杨>海桐>雪松。

Effects of Air Pollution on Plant Physiological Characteristics in Nanyang City

Mature leaves of common landscape trees were collected to study the effects of air pollution at 5 different sites on physiological and biochemical characteristics and the anti-pollution ability of landscape trees in Nangyang city.Physiological and biochemical indexes including cell membrane leakage rate,the proportion of chlorophyll,and the content of proline were measured in this paper.The indictors of different tree species in various pollution areas varied from each other and had remarkable significance.Four species in pollution tolerance ability ranked as Viburnum awabuki K.Koch,Euonymus japonicus,Gladiolus hybridus,Cedrus deodara.The sequence of pollution in different experimental sites from heavy to light was chemical plant,cigarette factory,central stadium,Nanyang normal university and the nursery garden.The research results provide theoretical and practical basis for air quality monitoring and city greening in Nanyang city.